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Use Cypress’s built-in selectFile() command and force the action when the native input is hidden:
cy.get('input[type="file"]')
.selectFile('cypress/fixtures/file.json', { force: true })The path is relative to your Cypress project root, and the file must exist. This supplies the file to the DOM input; you still need an assertion that your application processed the upload.
Why hidden inputs need force: true
Modern upload controls commonly hide the native <input type="file"> and expose a styled button or drop zone instead. Cypress documents this pattern in the selectFile() API reference.
By default, Cypress applies actionability checks before interacting. A hidden input fails visibility checks, so pass { force: true } when your test’s purpose is to attach a file directly. Forced actions skip checks for visibility, disabled state, DOM attachment, animation and covering elements; they also do not scroll the element into view. These details are described in Cypress’s interaction guide.
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Forcing the input proves that your test supplied a file to the page. It does not prove that a real user can click the visible button, that the picker opens, or that the server accepted the upload. Test those user-facing behaviors separately when they matter.
Basic hidden-input upload
- Put a deterministic test file under your project, commonly in
cypress/fixtures/. - Locate the file input with a stable selector.
- Call
selectFile()with the fixture path andforce: true. - Assert on the application result, such as a filename, preview, success message or completed request.
describe('document upload', () => {
it('uploads a PDF through the hidden input', () => {
cy.visit('/documents/new')
cy.get('input[type="file"]')
.selectFile('cypress/fixtures/report.pdf', { force: true })
cy.get('[data-cy="upload-success"]')
.should('be.visible')
.and('contain', 'report.pdf')
})
})A path is preferable when the file exists on disk because Cypress attaches the file as it is stored, avoiding accidental text encoding changes.
Choose a selector that identifies the correct input
Use a dedicated data-cy or data-testid attribute when possible. A generic input[type="file"] selector is fine for a page with one input, but it can select the wrong control when a form contains several upload fields.
cy.get('[data-cy="avatar-input"]')
.selectFile('cypress/fixtures/avatar.png', { force: true })The default selection action requires exactly one file input or a label associated with one. If your selector matches multiple elements, narrow it with a field-specific attribute, .first() or a container scope, and confirm that the resulting test describes the intended control.
Use fixtures, aliases and in-memory files
Binary fixture through an alias
When loading a binary fixture first, specify a null encoding so Cypress does not interpret the bytes as text:
cy.fixture('report.pdf', null).as('report')
cy.get('input[type="file"]')
.selectFile('@report', { force: true })This is useful when a test reuses the same fixture or needs to prepare it before selection.
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Construct file contents in the test
The object form accepts contents and optional metadata. Cypress can infer the MIME type from the filename extension; provide mimeType explicitly when the extension is ambiguous or absent.
cy.get('input[type="file"]').selectFile({
contents: Cypress.Buffer.from('file contents'),
fileName: 'report.txt',
mimeType: 'text/plain',
lastModified: Date.now(),
}, { force: true })fileName, mimeType and lastModified are optional. If Cypress cannot infer a type, the MIME value may be empty, so set it when your application validates it.
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Multiple selection only works when the input has the HTML multiple property. Select the input specifically marked for multiple files:
cy.get('input[type="file"][multiple]')
.selectFile([
'cypress/fixtures/one.txt',
'cypress/fixtures/two.txt',
], { force: true })If the input does not permit multiple files, Cypress reports a failure instead of silently changing the application’s behavior.
Test a drag-and-drop upload zone
A drop zone is a different interaction from selecting a hidden input. Use action: 'drag-drop' on the visible drop target (or on the document), rather than forcing the hidden input:
cy.get('[data-cy="drop-zone"]').selectFile(
'cypress/fixtures/report.pdf',
{ action: 'drag-drop' },
)In drag-drop mode the subject can be any DOM element or the document. In the default selection mode it must be one file input or an associated label. Choose drag-drop when the behavior you need to cover is the zone’s drag events, highlighting and drop handling.
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Assert the upload outcome, not just file selection
selectFile() changes the input’s selected files and dispatches the events your application normally handles. It does not guarantee that validation, a network request, server-side storage or post-processing succeeded. Cypress’s FAQ notes that upload behavior depends on how the application is implemented; see Cypress’s FAQ.
Pick an assertion that represents your product’s contract:
- Client-side response: a preview image, filename chip, progress completion or enabled Submit button.
- Validation: an expected error for an unsupported extension, size or MIME type.
- Network behavior: intercept the upload request and assert its method, URL or response.
- Server result: a success toast, record in a list or downloadable link visible after the request finishes.
cy.intercept('POST', '**/api/documents').as('upload')
cy.get('input[type="file"]')
.selectFile('cypress/fixtures/report.pdf', { force: true })
cy.wait('@upload').its('response.statusCode').should('eq', 201)
cy.get('[data-cy="upload-success"]').should('be.visible')Do not use a successful command completion as your only assertion. A file can be attached while the application rejects it later.
Common failures and fixes
| Symptom | Likely cause | Fix |
|---|---|---|
| “Element is not visible” | The native input is intentionally hidden. | Use { force: true } after confirming that direct input selection is the behavior under test. |
| “Expected subject to be a file input or label” | The selector targets a button, wrapper or drop zone while using the default action. | Select input[type="file"] (or its associated label), or switch to { action: 'drag-drop' } for a drop target. |
| File not found | The path is wrong or the fixture is outside the project root. | Check spelling and case, and place the file under the project directory. Paths are relative to the directory containing Cypress’s default configuration file. |
| Multiple-file selection fails | The input lacks the multiple property. |
Use the application’s multiple-file input or test one file at a time; do not expect Cypress to add the property. |
| Binary file is corrupted | A fixture was read using text encoding. | Load it with cy.fixture('name', null), or pass its path directly. |
| Selection succeeds but no upload occurs | The application requires a change event, a separate submit action, validation, or a network response. | Assert the UI flow and request, and perform the required submit or continue action. |
| Timed-out command | The input, alias or file path was not available before Cypress’s timeout. | Wait for the page state that creates the input, correct the selector/path, and avoid arbitrary delays when a visible condition can be asserted. |
Actionability, visibility and Cypress versions
selectFile() was added in Cypress 9.3.0. The command reference records later changes, including per-axis scrollBehavior support in 15.20.0. As of Cypress 16, the default visibility algorithm delegates to the browser’s native Element.checkVisibility() API, but the hidden-input pattern still uses force: true when the input is not directly visible.
Force only the file-selection command that needs it. Keeping other interactions subject to normal actionability checks helps catch detached, covered or disabled controls. If you need to verify that a visible “Choose file” button activates the picker, write a separate test for that user-facing control instead of treating a forced selection as proof.
Should you use a plugin or another upload helper?
For current Cypress end-to-end tests, start with the built-in command. Cypress describes the older cypress-file-upload package as deprecated; the built-in command drew heavy inspiration from it and removes the extra dependency for this use case.
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Testing Library’s user-event v13 upload helper belongs to a different testing layer. It is not a Cypress command, so do not mix its API into a Cypress chain.
Keep uploads deterministic and maintainable
- Check fixture files into version control and use small, purpose-built files for fast tests.
- Use stable test selectors instead of CSS classes that describe presentation.
- Give each test a clear file purpose, such as
valid-pdf.pdfortoo-large.zip. - Test accepted and rejected files separately so a failure identifies the validation rule that changed.
- Stub or isolate external storage when the goal is client-side behavior; use a dedicated integration test when the goal is the real backend.
- Wait on a meaningful UI state or intercepted request rather than adding a fixed sleep.
These practices keep a forced hidden-input interaction focused: attach known bytes, observe the application’s response and report failures at the layer that actually broke.
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Use the documented endpoint and options at ScreenshotNeo’s API documentation:
curl -G "https://api.screenshotneo.com/v1/shot"
-d access_key=YOUR_API_KEY
--data-urlencode url=https://stripe.com
-o shot.webpThe same request in Python:
import requests
r = requests.get(
"https://api.screenshotneo.com/v1/shot",
params={"access_key": "YOUR_API_KEY", "url": "https://stripe.com"},
timeout=90,
)
r.raise_for_status()
open("shot.webp", "wb").write(r.content)And in Node.js:
const q = new URLSearchParams({
access_key: 'YOUR_API_KEY',
url: 'https://stripe.com',
});
const res = await fetch(`https://api.screenshotneo.com/v1/shot?${q}`);
if (!res.ok) throw new Error(`Screenshot failed: ${res.status}`);
const fs = await import('node:fs/promises');
await fs.writeFile('shot.webp', Buffer.from(await res.arrayBuffer()));ScreenshotNeo includes full-page and element capture, device presets and custom viewports, retina scale, PDF controls, custom CSS and JavaScript, waits, request blocking, headers, cookies, user agents, timezone and geolocation, transparent backgrounds, resizing, caching, signed links, asynchronous webhooks, bulk capture and a usage API. Every feature is on every plan. The Free plan includes 1,000 shots per month without a card; paid plans start at $5 for 3,000 shots, with yearly billing providing two months free.
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Bottom line
For a hidden Cypress file input, call selectFile() with a project-relative path and { force: true }. Use an array only with an input that has multiple, use drag-drop mode for a drop zone, and always assert the application-visible or network result that demonstrates the upload actually worked.
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Frequently Asked Questions
Can Cypress upload to an input with display: none?
Yes. Target the native file input and pass { force: true } to bypass visibility actionability checks.
Does force: true verify that a user can open the file picker?
No. It attaches the file directly. Test the visible picker button separately if that interaction is part of your requirements.
What path should I pass to selectFile()?
Use a path relative to the Cypress project root, normally the directory containing your Cypress configuration file, such as cypress/fixtures/report.pdf.
How do I upload several files?
Pass an array of paths and select an input with the HTML multiple property.
Is cypress-file-upload still required?
No. Cypress’s built-in selectFile() command is the recommended starting point for current tests; the package is deprecated.
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